docs: def http_client(self, host=None, port=None):
          """
          allow requests in context -- e.g.:
  
          .. code-block:: python
  
              with container.http_client(port="80", ...) as c:
                  assert c.get("/api/...")
  
  
          :param host: str, if None, set self.get_IPv4s()[0]
          :param port: str or int, if None, set to self.get_ports()[0]
          :return: instance of :class:`conu.utils.http_client.HttpClient`
          """
  
          host = host or self.get_IPv4s()[0]
          port = port or self.get_ports()[0]
  
          yield HttpClient(host, port, self.http_session)